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Author Topic: From Hackaday: Using Moiré Patterns to Guide Ships  (Read 565 times)
von Corax
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Prof. Darwin Prætorius von Corax


« on: April 21, 2018, 10:14:07 pm »

A couple of weeks ago Hackaday posted a pointer to a video article on these marine navigation aids, known as Leading Mark Indicators or Inogon lights.

Using Moiré Patterns To Guide Ships


The idea is that a set of optical grates inside the fixture generate a moiré pattern which varies depending on your angle of view: Viewed from dead on the light's centre line, the pattern forms a set of straight vertical bars, but when viewed from off-centre, the pattern forms arrows or chevrons pointing the direction back to centre.

This idea immediately struck me as "about as steamy as it gets;" I was surprised to discover that the patent dates to 1982.

What other Steampunkish technology have you seen that turned out to be relatively modern?
« Last Edit: April 21, 2018, 10:17:16 pm by von Corax » Logged

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